import Vue from 'vue'
import VueRouter from 'vue-router'
import Home from '@/components/Home.vue'
import Login from '@/components/Login.vue'
import Welcome from '@/components/Welcome.vue'
import User from '@/components/user/User.vue'
import Rights from '@/components/power/Rights.vue'
import Roles from '@/components/power/Roles.vue'
import GoodsList from '@/components/goods/GoodsList.vue'
import Params from '@/components/goods/Params.vue'
import Cate from '@/components/goods/Cate.vue'
import Add from '@/components/goods/Add.vue'
import Order from '@/components/order/Order.vue'
import Report from '@/components/report/Report.vue'

Vue.use(VueRouter)

const routes = [
  { path: '/', redirect: '/login' },
  { path: '/login', component: Login },
  {
    path: '/home',
    component: Home,
    // 首页路由重定向到user
    redirect: '/welcome',
    children: [
      { path: '/welcome', component: Welcome },
      {
        path: '/users',
        component: User
      },
      { path: '/rights', component: Rights },
      { path: '/roles', component: Roles },
      {
        path: '/goods',
        component: GoodsList
      },
      { path: '/goods/add', component: Add },
      { path: '/params', component: Params },
      { path: '/categories', component: Cate },
      {
        path: '/orders',
        component: Order
      },
      { path: '/reports', component: Report }
    ]
  }
]

const router = new VueRouter({
  routes
})

// beforeEach 导航守卫
router.beforeEach((to, from, next) => {
  // to将要访问的路径
  // console.log(to)
  if (to.path === '/login') return next()
  // from 代表从哪个路径跳转而来
  // next是一个函数，表示放行
  // next()放行next( " / login')强制跳转
  // 获取token值
  const tokenStr = window.sessionStorage.getItem('token')
  // 判断window.localStorage中是否有存在‘token’值
  // 如果不存在就停留在login
  if (!tokenStr) return next('/login')
  // 存在就立即跳转    防止无token，直接利用hash值跳转
  next()
})

export default router
